54 
Psyche 
[April 
UNDESCRIBED SPECIES OF DICRANOPTYCHA FROM 
EASTERN NORTH AMERICA (TIPULID^E, DIPTERA).* 
By Charles P. Alexander, 
Amherst, Mass. 
While revising the species of the crane-fly genus Dicrano- 
ptycha in my collection, a few species that had not been described 
were noted and their diagnoses are given in this paper. The 
material upon which the descriptions are based was largely in- 
cluded in the writer’s collection and in a very extensive series of 
these flies collected in Indiana, Tennessee, North Carolina, 
Georgia and Florida by Prof. J. Speed Rogers of the University 
of Florida. Specimens of Dicranoptycha septemtrionis were taken 
by Dr. Crampton and by Mr. M. C. Van Duzee. I express my 
sincere thanks to all of the above named gentlemen for their co- 
operation in this matter. 
The crane-flies of the genus Dicranoptycha are eminently 
characteristic of open Austral woodlands, often occurring far 
from running water. The immature stages of certain species, at 
least, are spent in dry soil in habitats such as the above. Recent 
papers by the writer on the Eastern species are included in the 
following references: Entomological News, 30: 19-22; 1919. 
Pomona Journal of Entomology and Zoology, 11: 67-74; 1919. 
Cornell University Agr. Expt. Sta., Memoir 38: 829-830; 1920. 
The structure of the male hypopygium offers the best 
characters for the differentiation of some of the otherwise very 
similar species. In general, the basistyles are unarmed and do 
not offer good specific characters. The two dististyles are broad- 
ly joined at base, the outer more or less heavily chitinized and 
armed in various ways with teeth and erect setulse. The shape 
of this style and its armature is of prime importance in defining 
the various species. In D. tigrina Alex., D. minima Alex, and D. 
pallida, sp. n., there are no denticles on the outer margin of the 
style. The inner dististyle is more fleshy and differs in shape in 
Contribution from the Department o Entomology, Massachusetts 
Agricultural College. 
